| 22101 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 22102 | Petrocarbon Energy Corporation | | Oil Operator | Sep 1996 |
| 22103 | Petrocarbon Energy Trust | | Oil Operator | Sep 1996 |
| 22104 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Jul 2026 |
| 22105 | Petrocoastal, Inc. | Frisco, TX 75036 | Oil & Gas Operator | Jul 2026 |
| 22106 | Petrocon Inc | Delaware, OH 43015-7147 | Oil & Gas Operator | Dec 2010 |
| 22107 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 22108 | Petrocorp Acquisition Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2002 |
| 22109 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22110 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 22111 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 22112 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 22113 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 22114 | Petrodril Inc | Farmington, NM 87401 | Oil & Gas Operator | Jan 1987 |
| 22115 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 22116 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 22117 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 22118 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 22119 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 22120 | Petrogas Energy Services, LLC | Dallas, TX 75214 | Oil Operator | Jul 2026 |
| 22121 | Petrogas Exploration Inc | | Oil Operator | Apr 2026 |
| 22122 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 22123 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 22124 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 22125 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2026 |
| 22126 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 22127 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 22128 | Petrohunter Operating Company | | Oil & Gas Operator | Dec 2013 |
| 22129 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 22130 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 22131 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 22132 | Petrolegacy Energy II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2023 |
| 22133 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 22134 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | Jul 2026 |
| 22135 | Petroleum Advisors Int'L., Inc. | Houston, TX 77224 | Gas Operator | Jun 2005 |
| 22136 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Jul 2026 |
| 22137 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 22138 | Petroleum Corpor | | Oil Operator | Jan 1983 |
| 22139 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 22140 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 22141 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 22142 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 22143 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 22144 | Petroleum Development LLC | | Oil Operator | Jul 2018 |
| 22145 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 22146 | Petroleum Energy Corp | | Oil & Gas Operator | Jul 2012 |
| 22147 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 22148 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 22149 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 22150 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 22151 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 22152 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 22153 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 22154 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 22155 | Petroleum Exploration Co | | Oil Operator | Dec 2024 |
| 22156 | Petroleum Exploration Company LTD Dba Petex | | Oil & Gas Operator | May 2026 |
| 22157 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | May 2026 |
| 22158 | Petroleum Exploration Company LTD., Limited | Breckenridge, TX 76424 | Oil & Gas Operator | May 2026 |
| 22159 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 22160 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 22161 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22162 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 22163 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 22164 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 22165 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 22166 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 22167 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 22168 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | Mar 2011 |
| 22169 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 22170 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 2026 |
| 22171 | Petroleum Prod. MGMT | | Oil Operator | Nov 1995 |
| 22172 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 22173 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 22174 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 22175 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 22176 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jul 2026 |
| 22177 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
| 22178 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |
| 22179 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 22180 | Petroleum Properties MGMT Co LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2005 |
| 22181 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 22182 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 22183 | Petroleum Property MGMT, Inc (A) | Fort Worth, TX 76101 | Oil & Gas Operator | May 1994 |
| 22184 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 22185 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 22186 | Petroleum Recovery Systems, L.C. | Houston, TX 77024 | Oil Operator | Jul 2026 |
| 22187 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 22188 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 22189 | Petroleum Resource Management Corp | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 22190 | Petroleum Resource MGMT Co TX | | Oil & Gas Operator | Sep 2020 |
| 22191 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 22192 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 22193 | Petroleum Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 22194 | Petroleum Service Partners, Inc. | Indiana, PA 15701-0000 | Oil & Gas Operator | Dec 2021 |
| 22195 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 22196 | Petroleum Techno | | Oil & Gas Operator | Dec 1996 |
| 22197 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Mar 2026 |
| 22198 | Petroleum Venture Capitol Corp | | Oil Operator | Jun 1980 |
| 22199 | Petroleum Well Service LLC | Silsbee, TX 77656 | Oil Operator | Jul 2026 |
| 22200 | Petrolia Drilling Corporation | | Oil & Gas Operator | Jul 2003 |